// talkback.c -- nosy, informative programe
#include <stdio.h>
#include <string.h>   //for strlen() prototype
#define DENSITY 62.4  // human density in lbs per cu ft
int main(void) {
  float weight, volume;
  int size, letters;
  char name[40];  // name is an array of 40 chars

  printf("Hi!, What's your first name?\n");
  scanf("%s", name);
  printf("%s, what's your weight in pounds?\n", name);
  scanf("%f", &weight);
  size = sizeof name;
  letters = strlen(name);
  volume = weight / DENSITY;
  printf("Well, %s, your volume is %2.2f cubic feet.\n", name, volume);
  printf("Also, your first name has %d letters, \n", letters);
  printf("and we have %d bytes to store it.\n", size);

  return 0;
}
